config/dfp.m4

   1 # Copyright (C) 2010-2022 Free Software Foundation, Inc.
   2
   3 # This file is part of GCC.
   4
   5 # GCC is free software; you can redistribute it and/or modify it under
   6 # the terms of the GNU General Public License as published by the Free
   7 # Software Foundation; either version 3, or (at your option) any
   8 # later version.
   9
  10 # GCC is distributed in the hope that it will be useful, but WITHOUT
  11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  13 # License for more details.
  14
  15 # You should have received a copy of the GNU General Public License
  16 # along with GCC; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 dnl @synopsis GCC_AC_ENABLE_DECIMAL_FLOAT([target triplet])
  20 dnl
  21 dnl Enable C extension for decimal float if target supports it.
  22 dnl
  23 dnl @author Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
  24
  25 AC_DEFUN([GCC_AC_ENABLE_DECIMAL_FLOAT],
  26 [
  27 AC_ARG_ENABLE(decimal-float,
  28 [  --enable-decimal-float={no,yes,bid,dpd}
  29                         enable decimal float extension to C.  Selecting 'bid'
  30                         or 'dpd' choses which decimal floating point format
  31                         to use],
  32 [
  33   case $enable_decimal_float in
  34     yes | no | bid | dpd) default_decimal_float=$enable_decimal_float ;;
  35     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
  36 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
  37   esac
  38 ],
  39 [
  40   case $1 in
  41     aarch64* | \
  42     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | s390*-*-linux* | \
  43     i?86*-*-elfiamcu | i?86*-*-gnu* | x86_64*-*-gnu* | \
  44     i?86*-*-mingw* | x86_64*-*-mingw* | \
  45     i?86*-*-cygwin* | x86_64*-*-cygwin*)
  46       enable_decimal_float=yes
  47       ;;
  48     *)
  49       AC_MSG_WARN([decimal float is not supported for this target, ignored])
  50       enable_decimal_float=no
  51       ;;
  52   esac
  53 ])
  54
  55 # x86's use BID format instead of DPD
  56 case x$enable_decimal_float in
  57   xyes)
  58     case $1 in
  59       aarch64* | i?86*-*-* | x86_64*-*-*)
  60         enable_decimal_float=bid
  61         ;;
  62       *)
  63         enable_decimal_float=dpd
  64         ;;
  65     esac
  66     default_decimal_float=$enable_decimal_float
  67     ;;
  68   xno)
  69     # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
  70     # dependency on libdecnumber.
  71     default_decimal_float=dpd
  72     ;;
  73 esac
  74 AC_SUBST(enable_decimal_float)
  75
  76 ])